Collate function in DataLoader

nlp
1

hi,
code explanation link
can you please explain how to effectivly use collate_fn in above tutorial

data_loader = torch.utils.data.DataLoader(dataset=coco, 
                                              batch_size=batch_size,
                                              shuffle=shuffle,
                                              num_workers=num_workers,
                                              **collate_fn**=collate_fn)